Accuphase A-48S

Making Frankenamps out of wonderful Accuphase equipment - you are messing with perfection in a less than perfect way.

Making Frankenamps out of wonderful Accuphase equipment - you are messing with perfection in a less than perfect way.

Thank you for your valuable opinion. I have no intention of opposing it or arguing with it. Let's get along, anyway. What I am interested in is only quality of sound.

@imhififan 

Since it's not easy to pull out the transformer wires (although I know I must pull out the transformer wires when I actually do conversion), a friend of mine who is familiar with PCB of electronics arranged an image which explains the connector layout for me.

Here's a link of the image:

A-48S_wires (003).jpg

Also, here are links for markings/part number of the component on the 716-1362-00:

716-1362-00 (1).JPG

716-1362-00 (2).JPG

According to him, the component on the 716-1362-00 is perhaps the bridge diode for rectification.

Hopefully, these photos will help you figure out.

Thank you.

@foolishman ,

Thanks for the photos, this time Accuphase is using a PCB instead of terminal block like before. Its connection method is still the same.

Looks like your friend already understands how these connectors work! Simply swap the positions of the black and yellow wires and swap the positions of the brown and orange wires to convert the power transformer primary winding from 100V to 120V.

On the #716-0962-01 board you will need to replace the small 100V transformer with a 120V one, or simply use a resistor to drop the input voltage.

IMHO, Accuphase products are certainly state of the art in terms of build and design, and if pricing was more affordable outside of Japan, I think more Accuphase enthusiasts would be able to enjoy it.